AC Wall Power Charger for Barnes & Noble Nook Bntv250 Bntv250a Tablet eReader AC Wall Power Charger for Barnes & Noble Nook Bntv250 Bntv250a Tablet Ereader. Input Voltage : AC 100-240V (Worldwide AC Input), Input Frequency : 50-60Hz. Only for Replacement power supply, Compatible with: Barnes & Noble Nook Bntv250 Bntv250a. Note:Sometime it will not notice charging,but actually it charging power to your device.You can test this by letting it charge overnight. MONEY BACK GUARANTEE -MONEY BACK GUARANTEE - We are Company that wants your Repeat Business so, if You Do Not Like our Product or Don't Want It For Any Reason, We Will Happily Accept The Return and Give Your Money Back. No Questions Asked. 30 Days Money Back Guarantee - 24 Months - Exchange.